[72-year-old retired economics professor Arthur De Vany's] blog promotes what he calls Evolutionary Fitness. Like his disciples in New York, he believes that ancient humans could perform physical feats that would awe the gym rats of today.
His followers believe that he too is capable of fearsome feats. When Mr. Durant told a gathering of New York cavemen that he had seen Mr. De Vany at a seminar in Las Vegas, Matthew Sanocki, 34, asked if Mr. De Vany looked as muscular in the flesh as in pictures on his blog.
"He looks great," Mr. Durant said. "You feel like he could, at a moment's notice, charge at you and trample you."
